<template>
  <div class="list" ref="wrapper">
      <div>
        <div class="area">
            <div class="title border-topbottom">当前城市</div>
            <div class="button-list">
                <div class="button-wrapper" >
                    <div class="button">{{this.currentCity}}</div>
                </div>
            </div>
        </div>
        <div class="area">
            <div class="title border-topbottom">热门城市</div>
            <div class="button-list">
                <div class="button-wrapper"
                 v-for="item of hot"
                 :key="item.id"
                 @click="handleCityClick(item.name)"
                 >
                 
                    <div class="button">{{item.name}}</div>
                </div>
            </div>
        </div>
        <div 
           class="area" 
            v-for="(item,key) of cities"
            :key = "key"
            :ref = "key"
        >
            <div class="title border-topbottom">{{key}}</div>
            <div class="item-list">
                <div class="item border-bottom"
                    v-for="innerItem of item"
                    :key="innerItem.id"
                    @click="handleCityClick(innerItem.name)"
                >
                    {{innerItem.name}}    
                </div>
            </div>
        </div> 
    </div>
  </div>
</template>

<script type="text/javascript">
import Bscroll from 'better-scroll'
import {mapState ,mapMutations} from 'vuex'
export default {
  name: 'CityList',
  props:{
      cities : Object,
      hot : Array,
      letter : String
  },
  computed:{
      ...mapState({
          currentCity:'city'
      })
  },
  methods:{
      handleCityClick (city){
          this.changeCity(city)
           this.$router.push('/')
      },
      ...mapMutations(['changeCity'])

  },
  mounted () {
      this.scroll =  new Bscroll(this.$refs.wrapper)
  },
  watch: {
      letter () {
        // console.log(this.letter)
        if (this.letter) {
            const element = this.$refs[this.letter][0]
            this.scroll.scrollToElement(element)
            // console.log(element)
        }
      }
  }
}
</script>

<style lang="stylus" scoped>
@import  '~styles/varibles.styl'
 .border-topbottom
   &:before
     border-color #ccc
   &:after
     border-color #ccc  
 .border-bottom
   &:before
     border-color #ccc
 .list
    overflow hidden
    position absolute
    top 1.58rem
    left 0
    right 0
    bottom 0
    .title
        color #666
        font-size .26rem
        line-height .54rem
        background #eee
        padding-left .2rem
    .button-list
        padding .1rem .6rem .1rem .1rem
        overflow hidden
        .button-wrapper
            float left
            width 33.33%
            .button
                text-align center
                padding .1rem 0
                margin .1rem
                border .02rem solid #ccc
                border-radius .06rem
    .item-list
        .item
            line-height .76rem
            padding-left .2rem
</style>
